sick and night and cant eat sugar?

So for my other pregnancies...I rarely felt queasy. This time when I do feel queasy it is either when I haven't ate in awhile or at night...like 8:30 pm. I usually like sweets but I can't eat anything sweet. It makes me nauseous thinking about it. When I tried to eat a Twix I had to spit it out. When I ate a mini muffin it made me feel sick. With my 1st child-I constantly ate chocolate frosted mini donuts. What I have been eating: eggs, salad with chicken, Mexican dinners like taco soup, salty snacks like beef jerky and veggie straws.....